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Diels-Alder ReactionsThe Diels-Alder reaction, a concerted [4+2]-cycloaddition between a diene a....
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Diels-Alder ReactionsThe Diels-Alder reaction, a concerted [4+2]-cycloaddition between a diene and an olefin to yield a cyclohexene, was discovered in 1928. Prof. Otto Diels and his coworker Kurt Alder mixed p-benzoquinone with an excess of cyclopentadiene and obtained the following result: